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Re: Creating serial output without losing keyboard control


From: Hollis Blanchard
Subject: Re: Creating serial output without losing keyboard control
Date: Tue, 30 Aug 2005 18:35:03 -0500

On Aug 25, 2005, at 3:17 PM, Cheryl Homiak wrote:

When I used lilo, I could use the serial command in the configuration to allow me to at least see when the boot occurred and to add ctrl-G to a message file so I also got an auditory beep. I can do this in grub with the pause command, but if I do that I can never allow the computer to boot unattended say, after a power failure, because it will wait for a keypress before continuing. It just occurs to me as I write this that maybe there is a way to use a timeout variable to avoid this problem, but I haven't checked that.

What happens if you put a ^G into one of the "titles"? Does it beep when the menu appears?

Is there any possibility of providing an option to separate the output from the input. I need to be able to receive the output via my braille or speech equipment through the serial port but maintain input control at the keyboard so I can respond to that output. Of course to some extent I can estimate when loading of grub takes place and to some extent I can just memorize my kernel choices and arrow down with no feedback, but there are times when these really aren't the best practices to have to follow.

After having a quick look at the code, splitting the input and output doesn't seem difficult.

Actually, why shouldn't we just send output to all registered terminals, and accept input from any of them? That doesn't look difficult either.

Since it's my understanding that grub legacy is not being actively developed, it made more sense to me to request this feature in grub2.

Yes, thanks for asking here.

Let me ask you though: is splitting input and output the ideal solution, or just something you can live with? If you could have any solution you can imagine, what would be the best? For example, a different tone playing as you select each title in the menu? I suppose built-in speech synthesis would be the best... and I guess that's not really possible without actual sound drivers?

-Hollis





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